I added the hooks necessary to start adding shoutcast and youtube, and created shoutcast and youtube plugins, and generated the plugins in src, and put some sample code in the youtube plugin. It's explained here:http://wiki.linuxmce.org/index.php/MediaSourcePlugin

Good stuff, from the wiki page I think this will open up a whole lot of rich online content as well as a better ability to support non online dynamic content. I look forward to having a play with this.